Insulated rail-joint.



PATBNTED FEB. 2?, 1906.

13.6. BBAINE.

. INSULATED RAIL I T.

nruoumn Hum 001. 90a.

WITNESSES:

MM.W I D WEB Nev.

INVENTOR:

a citizen of the Unite New York, in the her and to figures which form a This invention relates to certain im rove ments in bolts and washers for use on t e insulation of railway rail-joints.

The objects of the present irn' rovements areto' secure a washer at the on which will not be ofi the bolt, and t and results, to hereinafter in connection wit tion of the working parts.

stantially as will finall embraced i in which ii of insulatin are washers 18 1 8 outer sides of sai nliletal washers or shields t BANCROFT G. BRAINE, OF NEW ASSIGNMENTS, TO THE RAIL OF NEW YORK.

YORK, N. Y., AS'SIGNOR, BY MESNE JOINT COMPANY, A CORPORATION INSULATED RAIL-JOINT.

Specification of Letters Patent.

Patented Feb. e7, 1906.

Application filed October 81,1903. Serial No. 179,296.

.To all whom it may concern: I

Be it known that I, BANCROFT G. Brenna, d States, residing at ough of Brooklyn and State of New York, have invented and produeed a new and original Im Insulated Rail-Joints clare the. followin part of this specification.

provide a firm some of which ma he invention consists in Re errin corres' ending parts in each of the several fig ures, igure 1 is a central longitudinal secti on of the bolt and its insulating means, and Fi 2 is a similar section showin cations of construction section of the bolt and its in line 3 Fig. 3.

ch and lie -plates (not shown) rovement in and I- 'o hereby deto be a full, clear, and exact description 0 the invention, such as will enable others skilled in the art to which it ap ertains to make and use the same, reference eing had to the accompanying drawings, of reference marked thereon,

of the bolt forced at its inner edges into the bolt-perforation in the fish-plate, to at the same time seating of the wash and solid or against the plate, to secure an insulating-sleeve which will not slide 0 obtain other advantages be referred the descripthe improved amping-bolt and in the arrangements and combinations of arts of the same, all sublEe hereinafter set forth and n the clauses of thee aim. to the accompanying drawings, e numerals of reference indicate certain modi 1g 3' is a crosssulation, as upon Fig. 4 is a pore ective view of the insulating-sleeve shown in lg. 2, and Fig. 5 illustrates a further modified form of sleeve The bolt-body 14 is inclosed by asleeve 36,

material, the holes in the railbeing large enough to loosely receive the same, and at the ends of this sleeve, outside the fish lates, of insulating materia, The

washers are protected by 19 19, and against ese latter are adapted to bear, at one end,

nut 21 screwing u the bolt. The en been flat on both sides or of uniform thickand in their use a great difficulty has been experienced from the fact that that portion of the washer at its inner annular margin had no bearing at the face of the Washer against the fish-plate because of the large perforation made to receive the bolt'anditd In usage and under the of tightening the nuts 21, innermarginal portion of the insulating-washers 18 were pressed or forced into the rforation for the connecth washer practically lost its In carrying out my invention, however, I cup or recess the inner ace of the as at 24 in Figs. 1 and 2, so that on surfa.ce 25 is secured e fish-plate around its Obviouslv this recess may vary in depth and also in diameter so long as the difference in diameters of the recess and central opening of the washer isnot less than the difference in diameter of the perforation in the fish-plate and the insulating-sleeve u on the bolt'which y this construction the inner face of the insulatingwasher does not engage the edges of the perforation simply a flat surface, In the event of the washer bein formed integral with the i, as shown at 26 in Fig. 1, an annular groove 27 in the washer just outside the line of meetilig of ur ness,

insulating-sleeve. constant pressure therefore, the said to fit firmly against t perforation for the clampingbolt.

lies in said perforation.

in the fish-plate, but and wear is greatly reduced.

sleeve at one on the recess becomes the walls of the sleeve with said washer.

of the insulating-sleeves sliding oif t as in handling, and to obviate this end of somewhat smaller diameter measurement of the threaded taken from the outer edges 0 thehead 20 of the bolt and at the other end a on the threaded end 22 of .of the bolt-shank next its end 20 is preferably made oval in cross-section, as at 23, or angular, so as to lie in a correspondingly-shaped perforation of the fishplzite and prevent turning or twisting of the Heretofore the insulating-washers 18 have ther trouble has been experienced b reason he bolts,

I make that portion of the bolt next to its threaded than the said threaded portion, as at 28 in Fig. 2, the ortion being the threads. The insulating-sleeve is then made to fit this I claim as new is reduced portion 28 of the bolt and is slit or l slotted longitudinally to allow it to expand to slide over the threaded end portion of the 1 bolt. When in place, its resiliency closes it l around the reduced bolt portion, and its sliding off endwise is prevehted by engagement with the threads 22.

Under some conditions 1 may make separate insulating-sleeves 29 and 30 for the oval and round portion of the bolt, and in this case only the sleeve 30 for the round portion of the bolt is slotted at one side, as at 31 in Figs. 2, 3, and 4, since the oval sleeve 29 will readily sprin over the threaded end of the bolt. Where t e oval and round portions of the sleeve are in one piece 32, as shown in Fig. 5, the round portion 33 is slotted at opposite sides, as at 34 34, clear up to the oval portion 35, so as to allow it to spring over the threaded end 22 of the bolt.

It will be noted that the split sleeve described enables the bolt and its insulation to be manufactured separately and assembled afterward .-.t pleasure. Under some conditions, however, the insulating-sleeve may be molded or otherwise formed directly upon the shank of the bolt, so that it becomes an integral part of the bolt and is not removable therefrom except by breakage. In this case the insulated bolt is a single article of manufacture. I

Preferably the end of the insulating-sleeve upon the bolt is tapered at its end next the threaded end of the bolt, as shown in Fig. 2, so that the bolt and sleeve together will more readily enter the bolt-holes in the fish-plates and web of the rail.

Having thus described the invention, what 1. The combination with the bolt having a head at one end and a screw-thread at the oposite end, of an intermediate sleeve of insuation hugging said bolt, and washers at the ends of said sleeveand having recesses at the sides toward said sleeve.

2. The combination with a bolt having a reduced portion intermediate of its extremities with shoulders or stops at the ends of said reduced portion, of a split insulating-sleeve upon the reduced portion.

3. The combination with a bolt having a head at one end and a threaded portion at the other, and being reduced intermediate of said ends of a resilient split insulating-sleeve upon said reduced portion.

4. The combination with a bolt, of an insulating-sleeve upon the shank of said bolt, and an annular portion of insulation at one end of said sleeve, projecting peripherally beyond the same, and having its side next the sleeve annularly recessed.

5. The combination with a bolt, of an insulatingsleeve upon the shank of said bolt, and a washer at the end of said sleeve having in its side adjacent to the sleevean annular recess of greater diameter.

6. The combination with a bolt having a reduced portion intermediate of its ends, an insulating-sleeve upon said reduced portion, and an annular portion of insulation at one end of said sleeve, projecting peripherally beyond the same, and having its side next the sleeve annularly recessed.

7. The combination with a bolt, of an insulating-sleeve upon the shank of said bolt and having its end next the enteringlend of the bolt tapered at the outer edges, and an annular portion of insulation at theother end of the sleeve, next the head of the bolt, proipcting peripherally beyond the same, and

aving its side next the sleeve annularly recessed. i

In testimony that I claim the foregoing I have hereunto set my hand this 22d day of October, 1903.

BANCROFT G. BRAINE.

Witnesses:

CHARLES H. PELL, RUssELL M. EVERETT. 

